/*
 * Copyright 2009 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.matrix.tool.utils.cropper;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;


import java.io.FileNotFoundException;

/**
 * This class is used to help decode images from files which arrive as RGB data
 * from Android bitmaps. It does not support cropping or rotation.
 * 
 */
public final class RGBLuminanceSource /*extends LuminanceSource */{
//
//	private final byte[] luminances;
//
//	public RGBLuminanceSource(String path) throws FileNotFoundException {
//		this(loadBitmap(path));
//	}
//
//	public RGBLuminanceSource(Bitmap bitmap) {
//		super(bitmap.getWidth(), bitmap.getHeight());
//
//		int width = bitmap.getWidth();
//		int height = bitmap.getHeight();
//
//		int[] pixels = new int[width * height];
//		bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
//
//		// In order to measure pure decoding speed, we convert the entire image
//		// to a greyscale array
//		// up front, which is the same as the Y channel of the
//		// YUVLuminanceSource in the real app.
//		luminances = new byte[width * height];
//		for (int y = 0; y < height; y++) {
//			int offset = y * width;
//			for (int x = 0; x < width; x++) {
//				int pixel = pixels[offset + x];
//				int r = (pixel >> 16) & 0xff;
//				int g = (pixel >> 8) & 0xff;
//				int b = pixel & 0xff;
//				if (r == g && g == b) {
//					// Image is already greyscale, so pick any channel.
//					luminances[offset + x] = (byte) r;
//				} else {
//					// Calculate luminance cheaply, favoring green.
//					luminances[offset + x] = (byte) ((r + g + g + b) >> 2);
//				}
//			}
//		}
//	}
//
//	@Override
//	public byte[] getRow(int y, byte[] row) {
//		if (y < 0 || y >= getHeight()) {
//			throw new IllegalArgumentException("Requested row is outside the image: " + y);
//		}
//		int width = getWidth();
//		if (row == null || row.length < width) {
//			row = new byte[width];
//		}
//
//		System.arraycopy(luminances, y * width, row, 0, width);
//		return row;
//	}
//
//	// Since this class does not support cropping, the underlying byte array
//	// already contains
//	// exactly what the caller is asking for, so give it to them without a copy.
//	@Override
//	public byte[] getMatrix() {
//		return luminances;
//	}
//
//	private static Bitmap loadBitmap(String path) throws FileNotFoundException {
//		Bitmap bitmap = BitmapFactory.decodeFile(path);
//		if (bitmap == null) {
//			throw new FileNotFoundException("Couldn't open " + path);
//		}
//		return bitmap;
//	}

}
